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D. WILLIAMSON.

ARMATURE FOR'DYNAMO ELECTRIG'MAG HINES.

Patented Dec. '14, 1886.

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' D. WILLIAMSON.

ARMATURE FOR DYNAMO ELECTRIC MACHINES.

No. 354,292. Patented Dec. 14, 1886.

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(No Model.) 3 Sheets- Sheet 3.

WILLIAMSON.

ARMATURE FOR DYNAMO ELECTRIC MACHINES. No. 854,292. Patented' Dec 14,1886.

wi lmcooeo v amvamlo'c UNITED STATES ll) AVID l VILLTAMSON,

OF NElV YORK, N. Y.

ARMATURE FOR DYNAMO-ELECTRIC MACHINE$.

SPECIFICATION forming part of Letters Patent No. 354,292, dated December14, 1886.

Application filed August 2, 1856. Serial No. 209,750. (No model.)

To aZZ whom it may concern.-

Be it known that I, DAVID \VILLLiMsoN, of the city, county, and State ofNew York, have invented certain new and useful Improvements in Armaturesfor Dynamo-Electric lvflZtCl'lillQS, of which the following is a secification, illustrated by the accompanying drawings.

This invention is designed to promote econonly of material in theconstruction of laminated cores; and it consists of a spirallylaminatedarmature-core, including mechanism for holding the core together and forsupporting the armature.

Figure l in the drawings is a front view of my improved armature,including the shaft upon which it is mounted. Fig. 2 is an end view ofthe same, the armature being but partly wound. Fig. 3 is a front view ofthe same without the winding of the armature. Fig. 4 is a centrallongitudinal section of the armature on the line'a a of Fig. 5. Fig. 5is a cross-section of the same on line b b of Fig. 4. Figs. 6, 7, 8, and9 are details illustrating the construction of the armaturecore.

The numeral 1 in these figures denotes the core of the armature, while 2denotes the armature-shaft, and 8 the coils of insulated wire which arewound upon the same. This core, which is a spirallydaminated ironcylinder, is made in the following manner: A straightiron strip orribbon, 4, having any convenient length, a thickness which is equal tothe thickness of the proposed laminations, and a width which is equal tothe thickness of the wall of the cylinder, is bent edgewise, by suitablemachinery or otherwise, into the form of a close spiral whose diameteris equal to that of the proposed core. If the cylindrical spiral whichis thus formed should be shorter than is necessary for the proposedcore, the deficiency is to be supplied by bending in the same manner anadditional iron ribbon which is of the samc vidth and thickness, and byplacing the two cylindrical spirals which have been thus produced end toend in such a manner as to form a single continuous cylinder. Any numberof cylindrical spirals of the same description may be placed to gctherin the same manner, and may, if de sired, be soldered together in thespecified po sition until a continuous cylinder has been formed whoselength is equal to that of the proposed armature-core. The adjacentcoils or laminations of the core maybe separated from each other, ifdesired, by paint, paper, or other insulating substance. The severalparts or coils of core 1 are fastened compactly together by a suitablenumber of brackets, 5, each of which consists of two terminal parallelsnugs, 6, and an intermediate sole, 7, which is as long as said core.Such a bracket is shown in side elevation and in end elevation in Figs.8 and 9, respectively. After brackets 5 have been applied to core 1, insuch a manner as to hold the latter compactly together, as shown in Fig.5, wire 3 is wound upon the core in any ordinary or convenient manner.The support of the armature-core so constructed and held togetherconsists of a cylindrical wheel, 8, which is mounted upon shaft 2 bymeans of hub 9. Around this wheel, core 1, provided with brackets 5, ismounted by means of iron blocks 10, which are located one at each end ofeach such bracket. Each block 10, being provided with a slot or channelwhich contains one end of a bracket, 5, is fastened to the periphery ofwheel 8 by belts or screws 11.

Such being the mode of constructing and mounting my improved armature,the mode of its operation is similar to that of other ringarmatureswhich have laminated cores.

It is obvious that the economy of material resulting from theconstruction of the laminated core in the manner described becomesparticularly importantin the caseof ri ng-arrna tn res of large size.

I claim as my invention- 1. For the armature of a dynamoel'ectricmachine, an iron core consisting of spiral laminations, in combinationwith brackets which are mounted between fixed collars, substantially asand for the purpose specified.

2. As a means of mounting a cylindrical ring-armature upon a wheel orrotary cylinder, a series of brackets which are adapted to embrace thecore of said armature, in combination with slotted blocks which arebolted to said wheel or cylinder, and are adapted to hold said bracketsin position, substantially as and for the purpose specified.

0. A spirally]aminated armature-core and brackets for the support of thesame, in 00111- are fastened, substantially as and for the pur- 1obination with slotted blocks which hold said pose specified. brackets inposition, substantially as and for In testimony whereof I have hereuntosubthe purpose specified. scribed my name in the presence of two wit- 4.A spirallylaminated armature core, nesses. brackets which are adapted tosupport said DAVID WILLIAMSON. core, and slotted blocks which areadapted to Witnesses: support said brackets in combination with a H. G.WEsToN, wheel or rotary cylinder, to which said blocks D. C. WILLIAMSON.

